666015055 has 8 divisors (see below), whose sum is σ = 800434800. Its totient is φ = 532000896.

The previous prime is 666015043. The next prime is 666015061. The reversal of 666015055 is 550510666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 666015055 - 2⁵ = 666015023 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 666015055.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97770 + ... + 104359.

It is an arithmetic number, because the mean of its divisors is an integer number (100054350).

Almost surely, 2^666015055 is an apocalyptic number.

666015055 is a deficient number, since it is larger than the sum of its proper divisors (134419745).

666015055 is a wasteful number, since it uses less digits than its factorization.

666015055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202793.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 666015055 is about 25807.2674841797. The cubic root of 666015055 is about 873.2957543445.

The spelling of 666015055 in words is "six hundred sixty-six million, fifteen thousand, fifty-five".